Yes, I know, that these methods might help to calculate but my question was more about how to structure the data that I can realize this easy computation afterwards. Due to the flexibility I need, I would like to avoid calculations I don't need...
Antje John Kane schrieb: > Have a look at ?aggregate or the doBy library. They > may be what you want. > --- Antje <[EMAIL PROTECTED]> wrote: > >> Hello, >> >> I have a quite simple question, I guess. I have a >> data frame and I would like >> to process the data in several ways. >> The processing is dependent on grouping (factors) >> and the parameter itself. >> Meaning for parameter1 in the df, I would like to >> calculate the mean and sd >> when grouping by factor1. But parameter2 might be >> different. I thought of a >> structure like this: >> >> group1 >> param1 (mean, sd) >> param2 (sum) >> >> group2 >> param1 (mean, sd, median) >> param2 (mean, sd) >> >> I'm not sure how to build up this "processing info" >> structure. (The processing >> itself will be later based on this structure). >> Would you use a list? (matrix and vector are not so >> flexible for different >> length...) >> >> Can anybody help m with this? >> >> Antje >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, >> reproducible code. >> > > > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.